http://bcnranking.jp/news/1210/121029_24049.html
(in Japanese)
The cyan blue coloured line is for the share of the Pentax mirrorless cameras, which is a steady of above 5% throughout the year with the best results in October. However, with the introduction of the EOS-M, Pentax is yet once again the player who comes last as the EOS-M sales has quickly surpassed all the Pentax mirrorless sales as a whole!
As for the market leader in September and October, Olympus is still the winner and then followed by Sony and then Panasonic as the 1st and 2nd runner-ups. It can be seen from the Chart that Pana's place was taken over by Sony back to August, before that Pana is the 1st runner-up holder in the Japanese mirrorless market.
So, you may be curious for what contributes to the slight rise of market share of those Pentax mirrorlesses, nevertheless? I think it is solely because of the recent cut-throat strategy of Pentax Ricoh, see the latest Japanese prices of those Pentaxes and you will realise why!
http://kakaku.com/camera/digital-slr-camera/ma_251/
(in Japanese, all price displayed are in Japanese Yens, model names are shown in table.)
But I just wonder, how long Pentax Ricoh can sustain with such ridiculously low throat-cutting prices of their products? :-o